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Q.

What is the difference between LCD and LED screen?

Tags: electronics, lcd, led
Asked by Priya, 14 Dec '12 12:56 pm
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Answers (7)

1.

Technically speaking, LED screen is a misnomer. It is, in fact, an LED backlit LCD screen.

There seems to be a lot of confusion between LCD screens and "LED" screens. When people talk about an LED TV or an LED monitor, they are not talking about a TV where each pixel is made from a tiny LED. In fact, an LED TV is an LCD TV with LED backlighting. Older LCD screen use something called CCFL (cold cathode fluorescent light) as a source of backlight. CCFL is highly inefficient and quite large (comparatively to LEDs), so LEDs were developed for use as a backlight in LCD TVs. LED backlit LCD TVs use much less power than CCFL backlit LCD TVs, and the picture quality for LED backlit LCD TVs is much clearer and brighter.

There are technically LED screens, but those are only used on "jumbotron" screens in large stadiums. The reason they're only used in jumbotron screens is because LEDs have not been shrunk down small enough for use in living room televisions. However, if you're in a ...more
Answered by Sherlock WRman, 20 Dec '12 02:57 pm

 
  
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2.

Maloom nahi
Answered by Aabha Mehra, 14 Dec '12 01:08 pm

 
  
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3.

LCD takes more current because it is based on liquid crystal display technology.. The newer technology of Ligh Emitting Diods ( LED) takes less than half the current. Picture quality is also slightly improved..
Answered by subhash, 14 Dec '12 01:08 pm

 
  
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4.

The later provides better picture n visibility.
Answered by Damodar Biswal, 14 Dec '12 12:59 pm

 
  
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5.

The picture quality is better in led..then lcd.
Answered by harpreet, 14 Dec '12 12:58 pm

 
  
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6.

Lcd is liquid crystals and led is light emitting diodes
Answered by iqbal seth, 14 Dec '12 12:58 pm

 
  
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7.

LCD stands for liquid crystal display. The technology uses tiny cells that are used to open and close shutters. As the shutters are opened, light can pass through them. In a television, the cells are arrange in groups of three, with a red, a green and a blue filter.

An LCD television needs a light source behind the display screen and this has traditionally been several fluorescent tubes. 2009 saw the introduction of white LED arrays as a light source rather than fluorescent tubes. The LED technology allows for more efficient lighting and thinner cases for the televisions but the display technology itself is unchanged.

Confusingly, there is now a small but growing selection of LED televisions that do not use LCD at all. These models feature a red, a green and a blue light emitting diode for each pixel of the image. The image is created by the LEDs glowing at varying intensities and so they do not need any kind of back light. This same technology is used in large arena and open ai ...more
Source: wiki
Answered by Ataur Rahman, 14 Dec '12 12:57 pm

 
  
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Led iz best but 3d tv r overtaking..more

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